With Generic Scan Tool

READINESS CODE, GENERATING

Requirements

- The respective fuses of the Motronic fuel injection and ignition system must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as: lights and rear window defroster must be switched off.
- If vehicle is equipped with an A/C system, it must be switched off.
- Ground (GND) connections between engine and chassis must be OK.
- There must not be any DTCs stored in DTC memory, Diagnostic mode 3: Check DTC memory.
- Intake air temperature 5 to 35° C, Diagnostic mode 1: Check measured values; PID 15: Intake Air Temperature (IAT).

Work procedure

- Connect diagnostic tester.
- Perform a road test.

The following operating condition must be met during this road test:

- Coolant temperature must reach at least 80° C, Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

Observe safety precautions that apply to road tests.

Let vehicle cool off with the ignition switched off until the following condition is met:

- Coolant temperature approx. intake air temperature (5 to 35° C), Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

- Perform a road test again.

The following operating conditions must be met during this road test:

- Accelerate vehicle uniformly, not at Wide Open Throttle (WOT).

- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.

Note:
- Vehicle speed, Diagnostic mode 1: Check measured values; PID 13, Vehicle speed.
- Engine speed, Diagnostic mode 1: Check measured values; PID 12, engine rotations per minute (RPM).

- After 10 minutes, downshift until an engine speed of 2800 to 3500 RPM has been reached.

- Drive in deceleration mode at a speed up to approx. 1800 RPM.

- Park vehicle and let engine run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Perform a road test again.

The following operating conditions must be met during this road test:

- Accelerate vehicle uniformly, not at Wide Open Throttle (WOT).

- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.

- Park vehicle and let engine run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Read readiness code.

If a 1 is displayed instead of a 0 in the 8-digit number block:

- Perform a road test again.

The following operating conditions must be met during this road test:

- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.

- Park vehicle and let run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Read readiness code.

If in 8-digit number block:

- Display position 5: Secondary Air Injection (AIR) system

and/or

- Display position 6: EVAP canister system

a 1 instead of 0 is displayed:

- Repeat complete work procedure.